挤扩支盘桩极限承载力的预测

基金项目:

河南省科技攻关项目(991150103)

Forecasting Ultimate Bearing Capacity of Single Squeezed Branch Pile

1. Institute of Architecture Engineering, Henan Uuiversity of Science and Technology, Luoyang Henan 471003 China;
2. Institute of Geotechnique Engineering, Zhejiang University, Hangzhou Zhejiang 310027 China;
3. Fourth Design and Research Institute, Ministry of Machine-Building Industry, Luoyang Henan 471039 China

摘要: 用双曲线方法对110根挤扩支盘桩的极限承载力进行预测,并与直杆桩预测结果进行对比。结果表明由于支盘桩受力性状复杂,加载前期和中期预测精度较高,后期较低,误差超过15%;支盘桩的沉降曲线出现台阶时预测值与实测值误差较大;支盘桩极限承载力的预测精度与工程地质条件和桩本身的参数密切相关,桩身参数和地质条件相同条件下各桩预测精度比较接近。总体上直杆桩的预测结果优于支盘桩。
- 双曲线法 /
- 挤扩支盘桩 /
- 极限承载力
Abstract: This paper predicate the ultimate bearing capacity of squeezed branch pile based on 110 pile from different site bv hyperbola method,and compare with the results of the friction pile's. The results show that predicated curve is agree well with the filed measurement curve below ultimate load. The difference between the two curves is increasing when the top load of pile is approach to the ultimate load. The degree of error can not be constrained in 15% because of the complex transfer mechanism of this kind of pile. The predicated results of friction pile are better than that of squeezed branch pile. The precision is greatly relative to the condition of the property of soil and pile itself.
- hyperbola method /
- squeezed branch pile /
- ultimate bearing capacity